Experiment Results and Discussions

207 The experiments are done for several cases where the input voltage applied is set to start from as low as V, then increases to V, V and so on until reaching as high as V. The value of the input voltage is set to constant value for each experiment as a step function in order to see the transient response time and the settling time of the output characteristics. The experiment results are showin in figure . And all the output voltages are in the negative value due to the fact that this is an inverting‐type Buck boost converter. t is shown that for input voltage from V to volts, the output voltage may achieved . Volts with a settling time of . seconds, and the ripple is . V as required. When the input voltage is V to V, the settling time reduced to . ‐ . seconds and the output voltage reach . V. the experiment with input voltage V and V, the output voltage is . V to . V for with the settling time is less than .secodns, but there are high peaks voltage during the transient response. For all experiments the ripple can be as small as . volt as expected and the transient time tends to be longer when the input voltage is lower than the value of the desired output voltage.

6. Conclusions

This paper has presented the design of a buck‐boost converter to meet the specifications using the available components in the market. The output voltage of the Wind Turbine can be well regulated by the converter to achieve the voltage around . V to . V such that it can be used for charging the batterays as required. The ripple voltage can achieved . V as required, the settling time is around . to . seconds, the settling time tends to be longer when the input voltage is lower than the value of the desired output voltage. Acknowledgements The authors would like to acknowledge the support of the Nano Center ndonesia, LP nnovation Center, Cibinong, , Bogor, ndonesia, with very much appreciation and thanks. References A‐WNG nternational . High Efficieny Micro Wind Turbine: YWS‐500 Wind Luce. http:www.awing‐i.comenglish W_wind_turbine.html. Diakses Juli . Battery University, . BU‐ : Charging Lead Acid. http:batteryuniversity.comlearn articlecharging_the_lead_acid_battery. accessed by Juli . Dinniyah, Farah S.. Simulasi Perangkat Buck‐Boost Converter Untuk Panel Surya Dengan Pengendali PD, thesis in ndonesian , Universitas ndonesia, Dept.E.E., July . smail, N. F. N., ashim, N., Baharom, R. . A Comparative Study of Proportional Integral Derivative Controller and Fuzzy Logic Controller on DCDC Buck‐Boost Converter. EEE Symposium on ndustrial Electronics and Applications, 8‐ ‐ ‐ ‐ . Nirvansyah A., , Simulasi Perangkat Buck‐Boost Converter Untuk Turbin Angin Dengan Pengendali Logika Fuzzy, thesis, in ndonesian , Universitas ndonesia. REN , , Renewable Energy Policy Network for the st Century.. Renewables 2015 Global Status Report, REN . Sulthan, S. M., Devaraj, D. . Design, Simulation and Analysis of Microcontroller based DC‐DC Boost Converter using Proteus Design Suite. Proc. of nt. Conf. on Advances in Electrical Electronics, AETAEE. [Prosiding], Desember . W. art, Daniel. . Power Electronics. Valparaiso University, ndiana: The McGraw‐ill Companies, nc., Wahab W., Dinniyah,F.S.,and Rochman N.T., Design And Simulation Of A PD Controlled Buck Boost Converter For Solar Power Application, nternational Tropical Renewable Energy Conference i‐TREC , Bogor, ndonesia, October . Joint Scientific Symposium IJJSS 2016 Chiba, 20‐24 November 2016 208 Fabrication of CNT microarray for biosensor applications Nji Raden Poespawati a , Tomy Abuzairi a,b , Mitsuru Okada c , Retno Wigajatri Purnamaningsih a , Masaaki Nagatsu b,c,d a Department of Electrical Engineering, Universitas Indonesia, 16424, Depok, Indonesia b Graduate School of Science and Technology, Shizuoka University, 432‐8561, Hamamatsu, Japan c Graduate School of Integrated Science and Technology, Shizuoka University, 432‐8561, Hamamatsu, Japan d Research Institute of Electronics, Shizuoka University, 432‐8561, Hamamatsu, Japan Abstract Microarray technology has become one of the indispensable tools which can be used to identification of bio‐molecules in cells, tissues, and disease, such as disease diagnosis, prediction, prevention, and drug discovery. The major advantages of the microarray biosensor are their ability of the simultaneous analysis of thousands parameters on a single platform and minimal sample consumption. Furthermore, carbon nanotubes CNTs with their outstanding properties are potential material for many applications including biosensors. To increase the fluorescence detection, the microarray will be established within the three‐dimensional D structure. The advantage of the D structure CNT for microarray platform is the enhancement of active surface area without sacrificing the size of the device. For instance, the external surface area of one CNT spot is roughly ~ . × ‐ mm . As arrays of mm of CNT platform with µm spacing, it can contain as many as .8 × 8 spots that is high‐density microarrays. This high‐density microarray is powerful tools for the screening of pharmaceuticals, investigation of biomolecule interactions and patient diagnostics. n this paper, the CNT is fabricated in microarray configuration to realize biochip sensor design. The CNT microarray was fabricated by using electron beam lithography for patterning microarray on silicon substrate, RF sputtering for deposit catalyst, and thermal plasma chemical vapor deposition CVD for growing vertically aligned CNT. Keywords APPJ; plasma functionalization; CNT; 3D microarray; biosensor applications Corresponding author. Tel.: +62-21-7270078; fax: +62 – 21- 7270077. E-mail address: pupueng.ui.ac.id